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| author | Damien George <damien.p.george@gmail.com> | 2016-12-09 17:03:33 +1100 |
|---|---|---|
| committer | Damien George <damien.p.george@gmail.com> | 2016-12-09 17:07:38 +1100 |
| commit | f76b1bfa9f59fcfa03837c6934ad51d2db3ff4a3 (patch) | |
| tree | dd4882552d3fa3335c7e7f32f218231d967361fa /py/mpconfig.h | |
| parent | ad297a1950c74c35c90dd655ae9a69d33ed28dc0 (diff) | |
| download | micropython-f76b1bfa9f59fcfa03837c6934ad51d2db3ff4a3.tar.gz micropython-f76b1bfa9f59fcfa03837c6934ad51d2db3ff4a3.zip | |
py: Add inline Xtensa assembler.
This patch adds the MICROPY_EMIT_INLINE_XTENSA option, which, when
enabled, allows the @micropython.asm_xtensa decorator to be used.
The following opcodes are currently supported (ax is a register, a0-a15):
ret_n()
callx0(ax)
j(label)
jx(ax)
beqz(ax, label)
bnez(ax, label)
mov(ax, ay)
movi(ax, imm) # imm can be full 32-bit, uses l32r if needed
and_(ax, ay, az)
or_(ax, ay, az)
xor(ax, ay, az)
add(ax, ay, az)
sub(ax, ay, az)
mull(ax, ay, az)
l8ui(ax, ay, imm)
l16ui(ax, ay, imm)
l32i(ax, ay, imm)
s8i(ax, ay, imm)
s16i(ax, ay, imm)
s32i(ax, ay, imm)
l16si(ax, ay, imm)
addi(ax, ay, imm)
ball(ax, ay, label)
bany(ax, ay, label)
bbc(ax, ay, label)
bbs(ax, ay, label)
beq(ax, ay, label)
bge(ax, ay, label)
bgeu(ax, ay, label)
blt(ax, ay, label)
bnall(ax, ay, label)
bne(ax, ay, label)
bnone(ax, ay, label)
Upon entry to the assembly function the registers a0, a12, a13, a14 are
pushed to the stack and the stack pointer (a1) decreased by 16. Upon
exit, these registers and the stack pointer are restored, and ret.n is
executed to return to the caller (caller address is in a0).
Note that the ABI for the Xtensa emitters is non-windowing.
Diffstat (limited to 'py/mpconfig.h')
| -rw-r--r-- | py/mpconfig.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/py/mpconfig.h b/py/mpconfig.h index 5234cc7f9c..3612e6bcb3 100644 --- a/py/mpconfig.h +++ b/py/mpconfig.h @@ -293,11 +293,16 @@ #define MICROPY_EMIT_XTENSA (0) #endif +// Whether to enable the Xtensa inline assembler +#ifndef MICROPY_EMIT_INLINE_XTENSA +#define MICROPY_EMIT_INLINE_XTENSA (0) +#endif + // Convenience definition for whether any native emitter is enabled #define MICROPY_EMIT_NATIVE (MICROPY_EMIT_X64 || MICROPY_EMIT_X86 || MICROPY_EMIT_THUMB || MICROPY_EMIT_ARM || MICROPY_EMIT_XTENSA) // Convenience definition for whether any inline assembler emitter is enabled -#define MICROPY_EMIT_INLINE_ASM (MICROPY_EMIT_INLINE_THUMB) +#define MICROPY_EMIT_INLINE_ASM (MICROPY_EMIT_INLINE_THUMB || MICROPY_EMIT_INLINE_XTENSA) /*****************************************************************************/ /* Compiler configuration */ |